fix(stock): correct secondary item valuation across stock entry purposes

Backport of five fixes merged to develop, adapted to this branch, where
the field is still named `type` and the stock entry rate logic has not
been split out of set_basic_rate.

- A secondary row with no BOM link is costed out of the finished good,
  as legacy scrap was. Finished goods are rated last so a single
  validate pass sees the secondary rows' amounts. (#57732)
- Repack no longer flags secondary rows as finished goods, so each side
  takes the share the BOM declares instead of the scrap absorbing the
  finished good's percentage. (#57735)
- A BOM allocation of 0% means the row carries no cost, rather than
  falling through to the item's own valuation rate. (#57736)
- Secondary Item Type no longer waives a quality inspection on purposes
  that do not produce secondary items. (#57737)
- The BOM allocation applies to the consumption entry's cost when the
  raw material cost comes from one. (#57738)

Replaces the individual backports, which could not be cherry-picked
cleanly: every hunk needed rewriting against the pre-rename field and
the un-refactored rate logic.

erpnext/controllers/stock_controller.py

@@ -70,9 +70,23 @@ QI_OUTGOING_PURPOSES = (
 )
 
 
+SECONDARY_ITEM_PURPOSES = ("Manufacture", "Repack", "Disassemble")
+
+
+def is_inspection_exempt_secondary_row(doc, row) -> bool:
+	"""Whether the row is a secondary item on a document that produces secondary items."""
+	if not (row.get("type") or row.get("is_legacy_scrap_item")):
+		return False
+
+	if doc.doctype == "Stock Entry":
+		return doc.purpose in SECONDARY_ITEM_PURPOSES
+
+	return True
+
+
 def stock_entry_row_requires_inspection(purpose, row):
 	"""Check if this Stock Entry row need a Quality Inspection."""
-	if row.get("type") or row.get("is_legacy_scrap_item"):
+	if purpose in SECONDARY_ITEM_PURPOSES and (row.get("type") or row.get("is_legacy_scrap_item")):
 		return False
 	if purpose == "Manufacture":
 		return bool(row.is_finished_item)
@@ -1604,7 +1618,7 @@ class StockController(AccountsController):
 			elif self.doctype == "Stock Entry":
 				qi_required = stock_entry_row_requires_inspection(self.purpose, row)
 
-			if row.get("type") or row.get("is_legacy_scrap_item"):
+			if is_inspection_exempt_secondary_row(self, row):
 				continue
 
 			if qi_required:  # validate row only if inspection is required on item level